Instant Download Molds, Mushrooms, and Medicines: Our Lifelong Relationship With Fungi 1st Edition Money PDF All Chapter
Instant Download Molds, Mushrooms, and Medicines: Our Lifelong Relationship With Fungi 1st Edition Money PDF All Chapter
Instant Download Molds, Mushrooms, and Medicines: Our Lifelong Relationship With Fungi 1st Edition Money PDF All Chapter
https://ebookmass.com/product/molds-mushrooms-and-
medicines-our-lifelong-relationship-with-
fungi-1st-edition-money/
OR CLICK BUTTON
DOWLOAD NOW
https://ebookmass.com/product/the-citizens-ledger-digitizing-our-
money-democratizing-our-finance-1st-edition-robert-c-hockett/
https://ebookmass.com/product/edible-mushrooms-chemical-
composition-and-nutritional-value-1st-edition-kalac/
https://ebookmass.com/product/europes-lifelong-learning-markets-
governance-and-policy-using-an-instruments-approach-1st-ed-
edition-marcella-milana/
https://ebookmass.com/product/nationalism-in-internationalism-
irelands-relationship-with-the-european-union-michael-holmes/
What Should I Do with My Money? Bryan Kuderna
https://ebookmass.com/product/what-should-i-do-with-my-money-
bryan-kuderna/
https://ebookmass.com/product/transforming-perspectives-in-
lifelong-learning-and-adult-education-a-dialogue-1st-ed-edition-
laura-formenti/
https://ebookmass.com/product/our-love-affair-with-drugs-the-
history-the-science-the-politics-1st-edition-jerrold-winter/
https://ebookmass.com/product/current-developments-in-
biotechnology-and-bioengineering-filamentous-fungi-biorefinery-
mohammad-taherzadeh/
https://ebookmass.com/product/south-koreas-engagement-with-
africa-a-history-of-the-relationship-in-multiple-aspects-1st-
ed-2020-edition-yongkyu-chang/
Molds, Mushrooms, and Medicines
Molds, Mushrooms, and
Medicines
Our Lifelong Relationship with
Fungi
Nicholas P. Money
Acknowledgments vii
1 Interacting: Encounters with Fungi from Birth to Death 1
Part I Inward
Part II Outward
WHAT IS A FUNGUS?
Not plant, not animal, more animal than plant, and treated as the
most mysterious kingdom of life in popular culture, fungi come in
many shapes and sizes.1 The fungi we see most often seem too big
to be categorized as microbes. These are mushrooms, which include
the fairy-tale fly agaric, with its red cap spotted with white scales;
shelf fungi, as big as dinner plates, that grow on decomposing logs;
and slices of white button mushrooms on pizzas. The reason we call
these species microorganisms is that the fungus that forms the
mushroom is microscopic. For almost all of their lives, these
organisms exist as spidery colonies of tiny threads called hyphae.
Each thread, or hypha, is ten times thinner than a human hair. These
filaments elongate and branch as they feed in soil and go about the
process of rotting wood. The colony of branching hyphae is a
mycelium. When this mycelium has grown over a large area and
absorbed enough food, it reverses direction and flows to the surface,
where the threads merge to form mushrooms. Mushrooms with gills
are the fruit bodies or sex organs of fungi that mist the air with
spores. As the urge to reproduce becomes an imperative, the fungus
moves from belowground to aboveground, changing its role from
feeding to fruiting in the wondrous cycle of its life.
But most fungi never form a mushroom and are microscopic
throughout their feeding and reproductive stages. These include
aquatic fungi that swim in ponds, with tailed cells that resemble
animal sperm; molds with stalks hung with sparkling spores that look
like miniature chandeliers; and 1,500 species of yeasts. Yeasts
include the species used in brewing and baking, whose Latin name is
Saccharomyces cerevisiae, and another fungus, called Candida
albicans, that lives on everyone and is best known, unfortunately, for
its irritating nature as the vaginal yeast.2 (Latin names are kept to a
bare minimum in this book, but some of the fungi are best known
through their Latin names, and others are so obscure that they have
never been given a common name.) Unlike fungi that grow as thin
threads, which we call molds, yeasts develop as single rounded cells
and produce buds, or daughter cells, on their surface.
Inward
2
Touching
FUNGI ON THE SKIN
ALTHOUGH WE MAY be exposed to fungi in the womb, the coating of
yeasts that forms when we are born marks the real beginning of the
lifelong human-fungus symbiosis. Fungi enter the lungs and the
digestive system as soon as we start breathing and breast- or bottle-
feeding, but the skin remains the biggest territory for the fungi
throughout life, the place where they dominate our microbiology. The
skin is considered the largest human organ, and the fungi grow all
over it, consuming natural oils and dead cells, supporting and
irritating the folds and furrows of the external tissue or epithelium.
They grow in the greatest numbers on the scalp, where one hundred
thousand to one million yeasts can huddle in the space of a postage
stamp.1 If humans were squeezed together at this density, all eight
billion of us would fit into a city the size of Los Angeles.2 When we
look in the mirror and brush our hair, we have no sense of this
congestion, but the fungi are in full swing, stirring the chemistry of
the skin, bossing the tinier bacterial residents around, and causing
the tissues to redden and flake when their routines are disturbed by a
new soap, shampoo, or lotion.
Most of our modesty can be concealed with a bath towel, but the
skin surface available for microbial growth is more extensive,
matching the area of thirty towels if we perform the thought
experiment of flattening out the nooks and crannies of the five million
hair follicles.3 The populations of fungi on this landscape are adjusted
from birth to death, with yeasts and filamentous species coming and
going according to rules that we are only beginning to understand.
The numbers and kinds of fungi that grow from head to toes have
also changed throughout history as we have wrapped ourselves with
clothes, slipped on shoes, and doctored the environment with
cosmetics and drug treatments. Going back even farther, the skin
mycobiome has been making and remaking itself since modern
humans emerged from the Rift Valley of Africa.
The skin is not the most inviting place for microorganisms,
because food and water can be scarce. These challenges have led
fungi that live on the scalp to specialize in feeding on the waxy
sebum secreted from sebaceous glands and others to become very
good at breaking down the keratin protein in the outermost layers of
the skin. Perspiration provides salty water, and some of the residents
overcome the aridity by producing their own water as they digest the
fats in the sebum. Through these measures, yeasts and molds
luxuriate on the skin. There are even more bacteria on the surface of
the body, but this is where the dimensions of the fungal cells become
pivotal. Although there are ten bacteria for every fungus on the skin,
the fungi outweigh the bacteria by a factor of ten.4 This difference in
size explains why the fungi are so important to the ecology of the
skin. Fungi also abound in the gut, as we will see in chapter 5, but
they do not fare quite as well as the bacteria. One of the reasons for
this is that fungi like to be flushed with oxygen, which is quite limited
in the intestines. Many of the gut bacteria are more flexible in their
oxygen requirements, which explains their growth in the trillions.5
Understanding what fungi do on the skin surface is a work in
progress for experts on the microbiology of the skin, with more
questions than answers, and a lot of conflicting information about the
identity of the fungi that support the clearest complexions, most
luxurious hair, and healthiest nails. The importance of quite subtle
changes in the skin mycobiome is illustrated by a complaint known as
sensitive skin syndrome. This skin condition is very common,
affecting more than half of all people, if we include very mild cases.
Symptoms are subjective, making it difficult to diagnose, and include
stinging, burning, and tingling sensations that follow the use of
cosmetics and exposure to everyday irritants. There are no visible
signs of sensitive skin in most patients, but when reddened patches
appear we call this erythema. The mycobiome was implicated in
sensitive skin in a study from South Korea that found a greater
diversity of fungi in skin swabs taken from women with the syndrome
relative to control subjects.6 Malassezia yeasts were the most
frequent fungi swabbed from the cheeks of all the women, but in the
patients with sensitive skin, this yeast was diluted by a surge in the
growth of other kinds of fungi, including a mold called Mucor. The
mycobiome differed from case to case, with little uniformity between
the communities of fungi that developed. Fungal involvement in the
chronic skin inflammation in sufferers of psoriasis follows the same
pattern as sensitive skin syndrome, with a greater diversity of fungal
species found in the patches of damaged skin compared with the
intervening areas of healthy skin.7
This research shows that these skin conditions are associated with
disruptions to the normal mycobiome. Dysbiosis is the term used to
describe instances of microbial disturbance, whether they are
associated with disease or not. Turbulent mycobiomes and
microbiomes more generally are part of the normal pandemonium of
nature, which makes it doubly difficult to determine when the
appearance of an unusual fungus means that something is amiss.
Although skin inflammation can be a direct response to the growth of
a particular fungal species, we do not refer to complaints like
sensitive skin syndrome as infections. Diagnosis of a fungal infection,
or mycosis, requires a greater level of tissue damage, but we are
dealing with a continuum of symptoms associated with fungi on the
skin rather than a clear distinction between an unsettled mycobiome
and more problematic disease.
At both ends of the spectrum of fungal development on the skin,
the behavior of the mycobiome is affected by the response of the
immune system. The immune system has a definite role in shaping
the mycobiome, by permitting some fungi to grow and eradicating
others. For its part, the mycobiome trains the immune system to
recognize harmless and harmful adjustments in numbers and species.
When we look at the most serious mycoses, we often find that they
develop after damage to the immune defenses. Infections of our
internal organs are featured in later chapters, but the mycoses of the
skin arise from our continuous interactions with fungi in the
environment and happen to people with perfectly healthy immune
systems.
DANDRUFF
Outbreaks of scalp ringworm in children are uncommon in more
prosperous countries today, and the drug treatments are effective in
treating individual cases when they develop. This does not mean that
the scalp has become a microbiological desert. Far from it. It is a hive
of fungal activity throughout our lives, no matter how many times we
wash our hair. Most of the fungi that grow on the skin do so as yeasts
rather than molds, as blobs rather than webs. This is a good thing,
because yeasts stay on surfaces, whereas molds, or filamentous
fungi, are fashioned for penetrating tissues, and nothing good comes
from skin invasion by fungi. Species of Malassezia yeasts are the
dominant fungi on the scalp. They are named for a French anatomist,
Louis-Charles Malassez, who found them growing in skin flakes
scraped from patients suffering from seborrheic dermatitis.
Seborrheic dermatitis is an extreme form of dandruff, sharing many
of its characteristics with the snowiness of hair that afflicts a good
chunk of humanity to varying degrees. Both complaints involve the
multiplication of Malassezia in the sebum exuded from the sebaceous
glands. The mouths of these microscopic glands open into the hair
follicles wherever we are hairy, and directly on the skin surface in
places where we are not. Sweat glands are separate things that
release more watery secretions whose evaporation is key to
controlling body temperature.
Sebum is marvelously complicated stuff that contains a mélange of
fats and oils and is produced in varying amounts according to age
and sex—more in men than women—and serves as the dietary staple
for the yeasts that live on the skin. These fungi are so perfectly
adapted to life on the skin that they have lost the ability to produce
their own fatty acids like other organisms and draw everything they
need from the sebum. We consume fats, of course, but our ability to
manufacture fatty acids from sugars in the diet is essential for
constructing membranes and performing all kinds of other metabolic
tasks. By surrendering this almost universal biochemical capability,
the evolving yeast saved a great deal of energy and bonded itself to
the skin for the rest of forever.28 Malassezia belongs to the
basidiomycete group of fungi rather than the ascomycetes that
include the molds that cause ringworm. Fungi that form gilled
mushrooms are classified as basidiomycetes, but the closest relative
of the dandruff yeast is a fungus that causes a crop disease called
corn or maize smut. (The infected ears become filled with blackened
spores that are used as an ingredient in Mexican cooking called
huitlacoche.) Both of these fungi—dandruff yeast and corn smut—are
specialized organisms that have become completely dependent on
their hosts.
Dandruff is an inflammatory condition that develops as the yeast
works its way into the skin, feeding on the sebum and releasing
irritating compounds onto the scalp. This disturbance to the skin
chemistry alerts the immune system, which responds by mobilizing
macrophages and killer cells against the fungus. Itching and skin
flaking are symptoms of the unfolding turmoil on the scalp.
Malassezia lives on everyone, so the reason that some of us are
spared dandruff and others itch, scratch, and flake is a bit of a
mystery. What we do know, however, is how to treat it.
Early in my research career, I worked at Yale University with a
visiting scientist from the Soviet Bloc who was very careful with
Another random document with
no related content on Scribd:
“Francis Russell, son of George and Mary Midford, was
privately baptized on the 12th, but died on the 23rd of
November, 1786.”
It is important that this entry should be placed on record, for while,
in after years, Miss Mitford speaks of herself as the only survivor of
three children, two sons having died in infancy, it has been stated in
print that “Mary Russell Mitford was their only child.” On the other
hand, although careful search has been made, no record of the
baptism or burial of a third child has been discovered in the Alresford
registers, and we can only assume, therefore, that this child must
have died at birth and on a date subsequent to that of his sister.
Sufficient for us, however, is the entry in these same registers:—
“Mary Russell, daughter of George and Mary Midford,
baptized February 29, 1788”—
the child having been born on December 16, 1787.
Of these early days we have, fortunately, a picture left by the child
herself. “A pleasant home, in truth, it was,” she writes. “A large
house in a little town of the north of Hampshire—a town, so small,
that but for an ancient market, very slenderly attended, nobody
would have dreamt of calling it anything but a village.[3] The breakfast
room, where I first possessed myself of my beloved ballads, was a
lofty and spacious apartment, literally lined with books, which, with
its Turkey carpet, its glowing fire, its sofas, and its easy chairs,
seemed, what indeed it was, a very nest of English comfort. The
windows opened on a large old-fashioned garden, full of old-
fashioned flowers, stocks, roses, honeysuckles and pinks; and that
again led into a grassy orchard, abounding with fruit-trees. What a
playground was that orchard! and what playfellows were mine!
Nancy [her maid], with her trim prettiness, my own dear father,
handsomest and cheerfullest of men, and the great Newfoundland
dog, Coe, who used to lie down at my feet, as if to invite me to
mount him, and then to prance off with his burthen, as if he enjoyed
the fun as much as we did. Most undoubtedly I was a spoilt child.
When I recollect certain passages of my thrice-happy early life, I
cannot have the slightest doubt about the matter, although it
contradicts all foregone conclusions, all nursery and schoolroom
morality, to say so. But facts are stubborn things. Spoilt I was.
Everybody spoilt me—most of all the person whose power in that
way was greatest: the dear papa himself. Not content with spoiling
me indoors, he spoilt me out. How well I remember his carrying me
round the orchard on his shoulder, holding fast my little three-year-
old feet, whilst the little hands hung on to his pig-tail, which I called
my bridle (those were days of pig-tails), hung so fast, and tugged so
heartily, that sometimes the ribbon would come off between my
fingers, and send his hair floating and the powder flying down his
back. That climax of mischief was the crowning joy of all. I can hear
our shouts of laughter now.”
A pretty picture this, and one to which, as she wrote of it, the tired
old woman looked back as on one of the few oases in a life which,
despite certain successes, was nothing short of a desert of
weariness and of struggle with poverty.
But apart from this boisterous love of play, the little girl early
developed a passion for reading, fostered and encouraged, no
doubt, by that “grave home-loving mother,” who “never in her life
read any book but devotion,” in whose room, indeed, it was matter
for astonished comment to find the works of Spenser.
At the age of three, little Mary showed a remarkable precocity of
intellect, and even before she had reached that early age her father
was accustomed to perch her on the breakfast-table to exhibit her
one accomplishment to admiring guests, “who admired all the more,
because, a small puny child, looking far younger than I really was,
nicely dressed, as only children generally are, and gifted with an
affluence of curls, I might have passed for the twin sister of my own
great doll.”
On such occasions she would be given one or other of the Whig
newspapers of the day—the Courier or Morning Chronicle—and, to
the delight of her father and the wonder of the guests, would prattle
forth the high-seasoned political pronouncements with which those
journals were filled.
Following this display there was, of course, reward; not with
sweetmeats, however, “too plentiful in my case to be very greatly
cared for,” but by the reading of the “Children in the Wood” by
mother from Percy’s Reliques, “and I looked for my favourite ballad
after every performance, just as the piping bullfinch that hung in the
window looked for his lump of sugar after going through ‘God save
the King.’ The two cases were exactly parallel.”
But one day “the dear mamma” was absent and could not
administer the customary reward, with the result that papa had to
read the “Children in the Wood,” though not before he had searched
the shelves to find the, to him, unfamiliar volumes. Following which
search and labour he was easily constrained by the petted child to
hand over the book to Nancy, that she might read extracts whenever
called upon. And when Nancy, as was inevitable, waxed weary of the
“Children in the Wood,” she gradually took to reading other of the
ballads; “and as from three years old I grew to be four or five, I
learned to read them myself, and the book became the delight of my
childhood, as it is now the solace of my age.”
Mary Russell Mitford at the age of three.
(From a Miniature.)
FOOTNOTES:
[1] Then also Dean of Exeter and, subsequently, Bishop of that
Diocese.
[2] Derived from the situation of the Castle keep, which lies
between the fords of the river Wansbeck, Northumberland.
[3] Many years afterwards, when appointed to the See of
Winchester, the late Bishop Thorold alluded to it as one of a
number of Town-Villages which he said he found so peculiarly
distinctive a feature of Hampshire.
CHAPTER II
Dr. Mitford’s spirit was a sanguine one; he could not believe that
Dame Fortune intended to frown on him and his for ever. With much
to commend it in a general way, the possession of such a spirit may
yet be a menace, a positive danger. To a man of Dr. Mitford’s
character it was a danger. It led him into the rashest of speculations;
it launched him upon the wildest of wild schemes and left him, nearly
always, a loser.
On one occasion, however, Fortune smiled on him in so dramatic
a fashion that thereafter his belief in himself could never be shaken.
It happened some long time after the family had been settled in
the dingy London apartments and, in accordance with his usual
practice, the Doctor had taken his little daughter to walk about
London—a never-failing source of delight to her, both then and in
later life.
“One day”—her own description of the event is so expressive and
circumstantial—“he took me into a not very tempting-looking place,
which was, as I speedily found, a lottery-office. It was my birthday,
and I was ten years old. An Irish lottery was upon the point of being
drawn, and he desired me to choose one out of several bits of
printed paper (I did not then know their significance) that lay upon
the counter.
“‘Choose which number you like best,’ said the dear papa, ‘and
that shall be your birthday present.’
“I immediately selected one, and put it into his hand; No. 2,224.
“‘Ah!’ said my father, examining it, ‘you must choose again. I want
to buy a whole ticket; and this is only a quarter. Choose again, my
pet.’
“‘No, dear papa, I like this one best.’
“‘Here is the next number,’ interposed the lottery-office keeper,
‘No. 2,223.’
“‘Ay,’ said my father, ‘that will do just as well. Will it not, Mary?
We’ll take that.’
“‘No!’ returned I obstinately; ‘that won’t do. This is my birthday, you
know, papa, and I am ten years old. Cast up my number, and you’ll
find that makes ten. The other is only nine.’
“My father, superstitious like all speculators, struck with my
pertinacity and with the reason I gave, which he liked none the less
because the ground of preference was tolerably unreasonable,
resisted the attempt of the office-keeper to tempt me by different
tickets, and we had nearly left the shop without a purchase, when
the clerk, who had been examining different desks and drawers, said
to his principal:—
“‘I think, sir, the matter may be managed if the gentleman does not
mind paying a few shillings more. That ticket, 2,224, only came
yesterday, and we have still all the shares: one half, one quarter, one
eighth, two sixteenths. It will be just the same if the young lady is set
upon it.’
“The young lady was set upon it, and the shares were purchased.
“‘The whole affair was a secret between us, and my father,
whenever he got me to himself, talked over our future twenty
thousand pounds—just like Alnaschar over his basket of eggs.
“Meanwhile time passed on, and one Sunday morning a face that I
had forgotten, but my father had not, made its appearance. It was
the clerk of the lottery-office. An express had just arrived from
Dublin, announcing that No. 2,224 had been drawn a prize of twenty
thousand pounds, and he had hastened to communicate the good
news.”
Twenty thousand pounds! Dame Fortune was indeed rewarding
the optimist. Dr. Mitford was nothing if not magnanimous, and
although he had presented the lottery ticket as a birthday present to
his daughter, and although it was due to her persistence only that the
winning number, 2,224, had been chosen, he at once claimed the
success as his own, and, when informing his friends, added that he
should settle the whole amount on his daughter.
No trace of any such settlement can be discovered; if it was made
it was speedily annulled and in the course of a very few years it had
been all squandered in the Doctor’s own reckless fashion.
“Ah, me!” reflects Miss Mitford. “In less than twenty years what
was left of the produce of the ticket so strangely chosen? What?
except a Wedgwood dinner-service that my father had made to
commemorate the event with the Irish harp within the border on one
side, and his family crest on the other!”
The infinite possibilities of twenty thousand pounds were not lost
on the Doctor. Forthwith he moved with his wife, child and few
belongings to Reading, then a fairly prosperous and eminently
respectable town, swarming “with single ladies of that despised
denomination which is commonly known by the title of old maids.”
At the period of which we are now writing its commerce was
practically confined to trading in the products of the rural districts
surrounding it—principally in malt, corn and flour. Being on the direct
coach-road from London to the West of England, it was, naturally, a
great and important centre for the carrying trade, as witness whereof
the many quaint old inns still standing. An air of prosperity pervaded
the streets, for the ancient borough was just beginning to rouse itself
from the lethargy into which it had drifted when its staple trade, the
manufacture of cloth, dwindled and died scarcely a century before.
“Clean, airy, orderly and affluent; well paved, well lighted, well
watched; abounding in wide and spacious streets, filled with
excellent shops and handsome houses,” is Miss Mitford’s description
of it, and she might have added that it was once again comporting
itself in the grand manner as was proper to a town whose origin is
lost in the mists of antiquity, but whose records, from the twelfth
century at least, are records of great doings of both Church and
State.
In Miss Mitford’s day there were still many picturesque examples
of fifteenth-century domestic architecture bordering the streets, while
the ruined magnificence of the Great Abbey, with its regal tomb of
Henry I before the High Altar, lent it a touch of dignity the like of
which few other provincial towns could assume.
The move from London to Reading took place in 1797, and the
house they inhabited was a new and handsome red-brick structure
on the London Road, fortunately still standing, and now known as
“Kendrick View.” Here, with his phaeton, his spaniels and
greyhounds, Dr. Mitford proceeded to enjoy himself with, apparently,
no regard whatever for the future. The swarms of old maids excelled
in arranging card-parties to which, by inviting the wives, they
managed to secure the presence and company of the husbands. At
these parties the Doctor was an ever-welcome guest, for, as we
have already noted, he was one of the finest whist-players of his
time. Everything he did was performed on a lavish scale. His
greyhounds, for instance, were the best that money could procure—
no coursing meeting either in the neighbourhood or the country for
many miles round was considered complete unless the Mitford
kennel was represented, nor, as the Doctor was impatient of defeat,
did he consider the meeting a success unless the Mitford kennel
carried all before it.
Meanwhile, and when not engaged in the mild excitements of
cribbage and quadrille, Mrs. Mitford paced the garden at the rear of
the house, “in contented, or at least uncomplaining, solitude,” for
even now, she could never be certain whether, at any moment, the
hazardous life her husband was leading might not plunge them once
again into a miserable poverty; “a complaining woman
uncomplaining.”
Their daughter’s education now became a matter of moment, for
she was in her eleventh year. Accordingly, she was entered as a
boarder at the school kept by M. St. Quintin, a French émigré, at 22,
Hans Place, Sloane Street, then almost surrounded by fields, and
even now, although much altered, a pleasant enough situation.